This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Busy Server


Even though servers do have their “protection” against overload throwing a 503 error, at the time when this happen, server can be really overloaded already. This plugin checks the actual CPU load and if higher than specified (by default 2 per every core), displays an error message.

Very simple checking is used and by no means is this a replacement to proper load balancing. Can be useful though, especially when your server system is undergoing a tuning or heavy maintenance, is under weak attack, etc. and you don’t want to disable the site completely.

Currently only Linux servers are supported ( = tested), other UNIX systems should work as well.


  • Cache detection (if page is cached, serve it regardless the load)

  • Support for Win servers

  • Test server compatibility

  • Storing settings outside of database for speed improvement

Found a bug or have a feature request ? Please report here at the plugin page.


  1. Go to ‘Plugins’ -> ‘Add New’ in the admin area of your site.
  2. Search for ‘Busy Server’.
  3. Click ‘Install’.

OR Manually:

  1. Upload server-busy.php to the /wp-content/plugins/ directory.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress.

Contributors & Developers

“Busy Server” is open source software. The following people have contributed to this plugin.

Translate “Busy Server” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



Initial release


Custom error message and maximum load settings


Fixed default values


Added proper 503 HTTP headers